Germanium, Titanium, and Anions (negative ions) - three very powerful chemical elements, are being blended together into the necklace fabric to help relieve stress and fatigue by improving blood flow & circulation. Many professional athletes are finding positive results in enhancing their sports performance while wearing these necklaces. Perfect for all types of sport: Baseball, Softball, Tennis, Martial Arts, Gym, Golf, Basketball, Fishing, Hiking, Hockey etc. We are the largest & most reputable tornado baseball necklace retailer offering you over 150 color combinations to choose from.